矿产保护与利用Issue(4)：81-86,6.DOI:10.13779/j.cnki.issn1001-0076.2017.04.017
三水碳酸镁法制备碱式碳酸镁过程研究
Preparation of Hydromagnesite Using Nesquehonite Method
摘要
Abstract
Taking magnesite ore as raw materials, MgCO3·3H2O whiskers were synthesized and used as precursors of high pure 414 type alkaline magnesium carbonate.The influence of mechanical agitation on crystalline process was investigated.The phase composition and microtopography of the produced samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).The results showed that the agitation contributed to accelerate the phase transition of MgCO3·3H2O.After stirring at 70 ° C for 60 minutes, MgCO3·3H2O completely transformed into uniform porous rod-like 4MgCO3·Mg(OH)2·4H2O.While MgCO3·3H2O would completely transformed into porous rosette-like 4MgCO3·Mg(OH)2·4H2O microspheres after 90 minutes without stirring.For hydromagnesite crystal, [MgO6] octahedrons were connected with common point and edge, and Mg2+ presented two different octahedral coordination.The two different [MgO6] octahedrons grew along the [100] and [001] direction, leading to the formation of spherical and rod-like morphologies, respectively.关键词
菱镁矿/碱式碳酸镁/三水碳酸镁/搅拌/制备Key words
magnesite/hydromagnesite/nesquehonite/agitation/preparation分类
矿业与冶金引用本文复制引用
王余莲,印万忠,张夏翔,戴绍书,郭俊,崔佳,蔡宇..三水碳酸镁法制备碱式碳酸镁过程研究[J].矿产保护与利用,2017,(4):81-86,6.基金项目
国家自然科学基金(51272163、50234040) （51272163、50234040）
辽宁省大学生创新创业训练计划(201610144021) （201610144021）
沈阳理工大学博士启动专项基金资助(2016BS02) （2016BS02）
